Hose clamp



March 26, 1929. E. osswALD HOSE CLAMP Filed Nov. 2, 1927 Patented Mar. 26, 1929.

.1; Nlrrn STATES WWU-EM SSWALD, F STUTTGART, GERMIN'Y, .ASSIGNOR 03E' GNR-HALF '1D0 EUEIN' BOCKQBNY, 0F STUTTGART, GERIVINY.

HSE @LAI/IIE'.

application filed November e, the?, Serial No. 230,650, and in Germany December il, i926.

This invention relates to a hose-clarnp tor various purposes, characterized in that the tying band consists of a Wire spiral, in Which a straight-Wire may be inserted or not. The tying band is ned at the one end in the clampcasing and Wound around the hose, whereupon the other end is hung into said casing. rl`he wire-spiral serves at the saine time as screw for a nut screwed onto the end of the Wirele spiral and designed to tightly pull 'the tying band around the hose.

The improved hose-clamp is shown b y Way ot example in the accompanying drawing, in which:

Fig. l is a front-elevation, the hose being shown in section.

Fig. 2 is a side elevation and Fig. 3 a top-plan view.

Fig. a shows on larger scale a constructional detail.

The tying band consists of a wire spiral o otsteel or other hard material. In the Wirespiral o a Wire lm. islocated which serves as core. The windings of the wire-spiral serve :tf-Fill at the Same time as screw-threads. The one end c of the wire-spiral a is inserted through a slot d of the clamp-casing and fixed on a bolt )t The other end g of the wire-spiral a is `wound around the hose to be fixed and inserted 3@ through a slot h of the clampcasing, whereupona nut z', screwed on to this end g of the ivirespiral, is tightened. The nut z' may be a thumb-nut or a polygonal-nut.

The hose-clamp may comprise several Wiremi spirals arranged side by side. the casing e being then of corresponding Width and having a necessary number of slots fr and hose.

lli

lhe casing e is bow-shaped, the portion de signed to bear onto the hose being curved in accordance with the curvature olf the hose. no The two arms oit the bow are beveled. ll. clamp with one Wirespiral is suiiicient lor hoses of small diameter, While for hoses olf greater diameter a clamp having several Wirespirals is preferably used.

The central-portion oit the bow has at the top-edge a flange Z, behind which engages the nut e' so that the Wire-spiral a is securely held in the slot fr. The Wire-spirals of steel-Wire may be made also Without Wire-core I claim:

l. A hose clamp comprising a tying band consisting of a Wire spiral, and a Wire core in said Wire spiral.

2. A hose clamp comprising a tying band 55 consisting of a Wire spiral said wire spiral serving at the same time as screw for a tensioning nut.

3. A hose clamp, comprising in combination a casing serving as stretchingshoe and 60 having a hole and a slot, a bolt rotatably mounted in said hole of said casing, a tying band consisting of a Wire spiral one end ol said band being inserted into said hole of the casing and attached to said bolt the tying band 65 being placed around the hose and the other end of said tying band being laid into said slot of said casing, and a nut screwed onto this end of said Wire spiral to stretch said tying band accordingly.

EUGEN OSSWALD. 1 

